-40%
Vintage Soviet fire alarm sensor, white, (1987)
$ 26.4
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Description
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There is white vintage Soviet fire alarm sensor ИОП 209-2 ДОП-3.
It was manufactured in 1987 and it has a Soviet sign of quality.
Like new, it hasn't been used, but its enclosure may have traces of storage: slightly yellowed plastic.
Weight of one item: 22 oz, (630 g)
The alarm device is designed to block door and window openings from the penetration of unauthorized persons, as well as to detect a fire, accompanied by smoke, in closed premises of residential buildings and institutions with an area of up to 20 m2 with a ceiling height of 4 meters. The device generates an alarm signal by changing the output circuit resistance from 350 Ohm to 50 kΩ when the beam is interrupted for at least 300 ms or smoke, which indicates an increase in the optical density of the medium by 20%, which corresponds to the attenuation of the light beam at a distance of 5 meters (2 , 5 x 2) 10 times.